The existence of higherordermode waves in expansion mufflers is proved theoretically.
从理论上推导了扩张室消声器内可能存在的高次波。
2
Since the characteristics of higherorder cladding mode resonances are specific in LPG, it will exhibit different phenomena during the process of grating manufacturing.
由于长周期光栅在较高次包层模谐振时的特殊性，在光栅制作的过程中会出现与其它包层模谐振不同的特性。
3
Such higherorder cladding mode resonances will result in ultra-broadband LPG. The possible application of such an LPG is predicted.